A barrel set and a lens module with the flow path for glue

A lens module includes a barrel set, a plurality of optical elements, and a glue. The barrel set includes a barrel unit, and a flow path unit. The barrel unit includes an inner circumferential surface about an axis and defining an accommodation space, an object side and an image side spaced at the axis and interconnecting with the accommodation space, and a plurality of mounting portions. The mounting portions are disposed around the inner circumferential surface, and arranged along the object side toward the image side. The flow path unit is formed on the barrel unit, and interconnecting at least two mounting portions. The optical elements are received in the accommodation space, and disposed in the mounting portions respectively. The glue fills the flow path unit up, and bonds the barrel set and the corresponding optical elements.